A negative metric is a performance indicator that tells us if something is going badly, but it doesn't show us when that same something is necessarily going well.
For example, velocity. If our velocity is low or fluctuating between iterations, this could be a sign that something isn't going well. However, if velocity is normal, there is no guarantee that the team is delivering useful software. We know that they are working, but that is all we know. Measuring the delivery of valuable software requires a combination of other metrics, including feedback from our customer.
Therefore, velocity is only useful if it's being used to determine what the team is capable of during each Sprint. It will also aid in scheduling ...
